What turns someone into a vicious killer? Is it purely a reflection of a dark or abusive childhood, or are you born with a brain wired for violence?
Researchers are studying the brain scans of murderers and psychopaths to find out.
"Every mean, vicious psychopath once upon a time, was an innocent young baby," said Dr. Adrian Raine, a neurocriminologist at the University of Pennsylvania
"It's only recently, with the advent of molecular genetics and brain imaging techniques that we have been...Full Story